disbursement_date saved as varchar

[paulrosenzweig]

disbursement_details__disbursement_date is being saved to redshift as a varchar. Other dates seem to be stored correctly, so maybe I introduced an error when adding disbursement date?

\d braintree.transactions 
                          Table "braintree.transactions"
                 Column                  |            Type             | Modifiers 
-----------------------------------------+-----------------------------+-----------
 _sdc_batched_at                         | timestamp without time zone | 
 _sdc_received_at                        | timestamp without time zone | 
 _sdc_sequence                           | bigint                      | 
 _sdc_table_version                      | bigint                      | 
 amount                                  | double precision            | 
 created_at                              | timestamp without time zone | 
 credit_card_details__customer_location  | character varying(128)      | 
 currency_iso_code                       | character varying(128)      | 
 customer_details__id                    | character varying(128)      | 
 id                                      | character varying(128)      | 
 order_id                                | character varying(128)      | 
 processor_authorization_code            | character varying(128)      | 
 processor_response_code                 | character varying(128)      | 
 processor_response_text                 | character varying(128)      | 
 status                                  | character varying(128)      | 
 type                                    | character varying(128)      | 
 updated_at                              | timestamp without time zone | 
 gateway_rejection_reason                | character varying(128)      | 
 refunded_transaction_id                 | character varying(128)      | 
 customer_details__email                 | character varying(128)      | 
 settlement_batch_id                     | character varying(128)      | 
 disbursement_details__disbursement_date | character varying(128)      | 
 disbursement_details__success           | boolean                     | 

The schema specification:

"disbursement_date": {
  "anyOf": [
    {
      "type": "string",
      "format": "date-time"
    },
    {
      "type": "null"
    }
  ]
},

This seems to match that of updated_at without the allowance for null.

"updated_at": {
  "type": "string",
  "format": "date-time"
},